Fi Technical

Hey scott. I am Using the hybrid SX woofer in a friends dodge quad truck console.....reatatching the factory console top back to it. I am not sure if i can squezze the needed area out to get enough air space for a ported enclosure. I will be using a eD nine.1 for the power to the woofer...the woofer is D2 and a 12"....Will the woofer perfrom well in a sealed enclsore? also what kind cubic footage do I need? Also do you happen to know off hand the displacement of the woofer? thanks carl

i know you guys are buisy and all but i have been trying to get information on gettin my 18'' BL either warranty or a recone because one of the voice coils only works sometimes. but i have a competition coming up in a couple weeks and i really need this sub fixed in order to get the points i need to go to state finals.

I have the box in the pic below and I don't believe it's gonna be the best for my Q! I want the most output possible! I'm thinking around 2.5 cuft net with the port around 30 Hz! I have a Rockford Power 1001BD stable @ 2 ohms. I listen to all types of music but love really low notes!! If someone could tell me the dimensions of a box with port dimensions it would REALLY HELP ME ALOT!!! Or, if you have other recommendations!!! Thanks!!!

Curious specificaly on the ''Q'' 18 w/bp

I just got a 1998 blazer (4 door) and transferred over my Sundown Audio SAE-1200D and 12" BL from my 99 grand am. The box is 2.5 cuft AFTER sub and port dislacement, tuned around 32-34hz (can't remember exactly off the top of my head) I have upgraded the BIG 3 with 1/0ga wire, ran conduit along the frame rail with 1/0ga to the amp. In my grand am I LOVED it, but now in the blazer it seems to be lacking... not sure what exactly, but it doesn't seem to rattle my noggin like it did in the grand am. My question is should I look at building another enclosure that would work better for the blazer? If so, how many cuft? tuned to? how should the sub and port face? Or is the blaz…

Well I just had a box made for my 15" BTL and they kinda messed up...first they made the woofer hole facing up and the ports facing up also....do the ports facing away from cabin sound louder? Also i found out that the box is tuned to around 29hz....how will that sound?????? Will it sound good..will it be loud most also? I listen to mostly all rap just to let people know (i know rap sounds better in different boxes hz wise)...The box is around 4cuft also just to throw that out there. Help is much appreciated thank you. Here's some pics. Inside...one of the ports.

Will 12-gauge speaker wires work with a Fi Q 15 D2? I hope so because I already have those wires installed with my current sub which is going to be replaced

OKay so i got my car back... 15" Q in a (supposed to be) 4 cu.ft. ported box.... i love it so far and sounds great. i need to listen to it more tommorw. i hardly had any time today. but anyways, to the point... My box is 4 cu. ft. which means the port should be 48-64 square inches.... well i have 4 3" ports which is: 1.5^2 x 3.1415 x 4 = 28.2735 if the box is 4 cu ft and i replace the 3" ported with 4" ports, that would give me about 50 (50.264) square inches but how much would it take from the rest of the box? how would it change the sound and output? and how hard would it be to change the ports out? I think it may be restricting the sub a lil with such lil port area...…

I am set on getting 2 15" BTLs, but I am trying to get some help from you guys on who makes really good enclosures. btw im obviously a noob

I have a excursion w/2 -18 Q's and want to know if i can tune them to 30hz instead of 28hz? and should i have the port and subs firing to the rear or facing up? all my boxes always had the port and sub on the same side.I would face them to the rear. I would face my box up and the bass cuts in half. Will this do same if i face the subs up and the port to the rear? I want to get the most that i can get out of subs and box. Any input....

My buddy has 2 XT-4000D amps made by US Amps, I was wondering if 1 of them would work good for a dual 2 ohm 15" Fi Btl Subwoofer

I have just purchased 2 15" BTL Fully loaded. They are on 2 mmats 2100.1. I just got them and they SLAM!!!!! I am seriously and deleriously happy BUT I know I could be happier. My box is very small for these subs and I drive a big car (Crown Vic) so I know a new box is a good idea. My current box dimensions are 48" Width 17" Height 17" Depth, measured OD......Port is 4.5" wide divided with .5" 15" deep 15" height, measured ID. This car is CLEAN CLEAN so with that in mind I don't want to go tearing it apart...totally. I dont mind ripping out the metal behind the seat or cutting the rear deck. Here is my goal: I want this system to BANG and does already but my trunk sounds…

im looking at using the ib3, and was wondering if there are any technicalities that i would need to take into consideration before doing it in my car. i would place the baffle behind my rear seat, and seal everything off w/ fiberglass where it goes under the rear deck and between the wheel wells/strut towers. anything else to take into consideration?

hi scott i have been trying to email you about helping me with a box for awhile and i would get a response either weeks after or no responses at all...I guess you are a busy guy so maybe my emails got overlooked but i have been trying to get box plans and a cut sheet for a box 3.5 cf tuned to 30 hz with the sub displacing .19..i have 31 width 15 high and 24 depth..i would like to use as lil depth as possible can you please help me? thanks oh and would it be possible to have like a picture with the demensions on it ?

Ok so my Q stopped working an i tested the coils an the left one reads 0 and the right one reads .8 i think it wierd that just one coil would burn or be messed up. Anyone have any input on this.? Thanks, Teddy

I have a 08 chevy crew cab I need to build an enclosure to go under the back seat for one Bl 12" 1 ,0hm I am running a T 1000 fosgate amp this will be a daily application I know I will need to raise the backseat a little I plan to raise it 4" but I would like to build an enclosure first the area I will have to work with when the seat has been raised will be best described as a wedge style box 55" wide 16'"high 8"D1 and 11"on D2 with a notch in the middle for the drive line tunnel if anybody can help come up with the die-mentions to build an enclosure for this I would be very grateful and also any recommendations on were and how to port this properly would be he…

Can somebody post them up? Trying to see if they'll work on my rear deck using the 19.1 cubic foot Cadillac Deville trunk...

I have 2 15Q (1st gen with no options) with 2 saz1500d and it gets hot over a short period of heavy bass music. I was wondering is there any way I can increase the power handling of the sub. I am not from the US so to ship the motor over to get the partial BP would be expensive. would it be possible to use the BTL spider on the Q or other options? I know changing the spider would increase Fs and Qts but would it be significant? thanks

I've got a 2000 Frontier xcab and I've got 10.42 cu ft box for 2 18's to work with. I've got a saz3000d coming but I want to know if I should go with 2 BL 18's or 1 BTL 18. I'm thinking the 2 bl's would be louder, but the btl has better Xmax with the x coil option. I don't crank my system all the time( I have a toggle switch so I can shut the sub amp off-It's great for keeping the cops at bay) but when I do I want to incite fear and cure constipation from a distance. I want the hair trick factor and I want it to sound ok, not like complete chit. I'm looking for some serious BOOM for what space I got. It will be in competitions and electrical upgrades will be done. …

does anyone have a cut sheet like the ones posted but with 2 18 btls Thanks in advance

These questions may have been answered before but a quick search did not turn up the obvious answers. I have 2 completely separate and very specific applications I'm looking at for 12" drivers (neither of which involve being inside a vehicle BTW) and I need a little bit more information to help in the decision making process. What is the motor OD on the Q series and the BTL (11.5" I think?) What is the overall depth of the 12" version of the Q and BTL? Also what is the motor only depth of both from the back of the frame? What is the generic xmech of both series? It's nearly the same I assume as baskets, vc od and suspensions are very similar. I figure about 35-36mm inwa…

Hifonics TXi1508D- Titan Series 1500 Watt Mono Amplifier pushing an 18 fi bl

Im in the process of having a box built for my tahoe for a 18" BTL. my boxes dont always come out the way i want so i decided to have this one made by someone who knows what they are doin.. well me being the kind of person i am.. ill bring the info i have from him to you guys and hope to get some support or get me in the right direction. Guy is fully aware of the BTL's and has made several boxes for them in the past. He says he would like to make it 8.5 cubes tuned to 30-35hz and says he will give it a little bit more port area than Fi recommends... does this sound ok to you guys? anyone have something similar or done anything similar. I know here in the fi forums its say…

Well,I just ordered a Q15 dual 1 ohm sub for my car. I had a 12w6v2 in a jl spec sealed box but after hearing the Q10 in a sealed boxed that I bought for my wife's car (hers goes lower and sounds better than my 12" ,just not as loud)I decided to go Fi also. I have a 06 Jetta and I wanted to run a sealed enclosure.I have lots of trunk space. I know that the spec sheet says 2-2.6 ft3 but is there anyone running larger and how does it sound. I want to focus on sq and very deep lows.

Hi, i wanted to know which of these two amps would be better for a bl 18... SAZ-1500d or an SAE-1000D